Tripping mechanism for cylinder printing-machines



TRIIIING MEGIIANISM POR CYLINDER PRINTING MACHINES.

Imre mn 1*;

N. PETERS, Hwwhlhagrnprm, wanhingmn. D7 C 2 Sheets-Sheet 42.

(NQ Model.) v

R. MIEHLE.

TNIPPING MBGHANISM NoN-CYLINDER PRINTING MACHINES.

No. 365,931. Patented July 5, 188'?` 'VV'LULEEE E 5:

NITED rares ATENT ROBERT MIEI-ILE, OF CHICAGO, ILLINOIS.

TRIPPING VIECHANISIVI FOR CYLINDER PRINTING-MACHINES.-

SPECIFICATIO'N forming part of Letters Patent No. 365,931, dated July 5, 1887.

Application lcd October 4, ISG. Serial No. 215,324. (No model.)

To all whom it may conceive.-

Be it known that I, ROBERT MIEHLE, of the city of Chicago, county of Cook, and State of Illinois, have invented certain new and usel'ul Improvements in Tripping Mechanism for Cylinder ITrinting-llIachines, of which the following is a specitcatiomto wit:

This invention relates to the tripping mechanism for cylinder printingpresses, in which the cylinder has two or more revolutions for one impression, the same consisting in the combination and arrangement of parts, where-- by the cylinder is controlled at will by the attendant, as hereinafter fully described.

In the drawings, Figure l is a portion of a side View in elevation of a two-revolution cylinder printing-11 ress with the invention applied thereto. Fig. 2 is a top plan .view of the same. Fig. 3 is asectional sideview showing the rock-shaft andconnecting-link for the impression cylinder. Fig. 4 illustrates the engaging friction roller or stud in and out of position with the cam.

A designates the main frame of the press, in which the impressioncylinder B is mounted, having splitjournal-boxes B', which are movable vertically in the frame A. The two halves of the journal-boxes are held together by eX tension-rods b, which pass through the link b', having set nuts (L a, which serve for regulating the height of the cylinder. The links b' pass downward in a square opening in the main frame, which guides the same in their movemeut when raised or lowered by the rock-shaft C, by means of eccentric c and square sliding box c', which slides horizontally in the square opening ot' the link b'l Upon the camshaft M is cam N, which engages with the friction rollers or studs u n' uponithe sliding or cam arms E, which has a. sliding boX, a, for supporting the same upon the shaft M as it is moved to and fro by the cam N. The farther end ot the arm E is Yformed with rackteeth, which engage the segcylinder downward.

pable of being moved laterally from cam-N, which will be explained presently.

Upon the lower portion of the main frame is a rod, g', having bearings gl g". At one end of this rod is secured a lever, L, broadened at its top, which engages the groove c of the stud u, the other end of said rod having a crank-arm, L', connecting with the vertical rod G, which passes through bracket K, the rod G having its top end broadened into a disk, R, for the operator to step upon when the impression-cylinder is to be tripped. The spring i/ upon rod g', which has one end secured to the bearing g3, and the other to the stop y' on rod g', serves to always keepA the lever L pressed inward, so that the friction-roller it will keep its proper position with cam N.

The following is a descriptive operation of all parts just described: Beginning at the time when the cylinder is in a raised position, asin the drawings, and the shaft M is turned in the direction of the arrows, the cam Nin revolving engages the friction-roller a, thereby drawing arm E away from the rock-shaft C, which revolves the same, so that eccentric c draws the The same is kept in this position until the impression is taken, after which the cam N arrives at a. point to engage the frictionroller n', the rock-shaft C being then turned so as to raise the cylinder.

In order to make cam N inoperative, so as to leave the cylinder in a raised position, the attendant forces the vertical rod G downward, which, through the crank-arm L', swings lever L outward, thereby drawing the elongated stud n out of the path of cani N sidewise, and thereby preventing the cam. disturbing the arm E, which leaves the cylinder in a raised position until the rod Cr is released by the attendant, after which spring jl/ returns the fric' tion roller or stud ain its proper position, to be again engaged by cani N in its next rcvo lution.

In view ot' modifying the means for operat ing the stud a, it is held that the same may be be operated by a hand-lever, or any other suit able means may be employed to slide stud n out from engagement with cam N. The rockshaft for raising and lowering the cylinder, as

shown herein, may be substituted for any of loo the well-known means which are used for this purpose, which are operated by a cam and cam-arm, as herein described.

What I claim as new, and desire to by Letters Patent, is

1. In a cylinder printing-press, the combination, with the impression-cylinder, operating-camand cam-arm, and means, substantially as described, operated by said cam and cam-arm, to raise and lower the cylinder, of the engaging-stud or friction-roller receiving a sidelong shifting movement from out of the path of said cam independent of said camarm, to trip the cylinder, substantially as described. l

2. In a cylinder printing-press, the combination, withvthe impression-cylinder, operating-cam and cam-arm, and means, substantially as described, operated by said cam and cam-arm, to raise and lower the cylinder, having a sidelong sliding. stud or friction-roller operated by the lever L independent of said cam-arm, substantially as described.

3. In a cylinder printing-press, the combination, with the impression-cylinder, operating-cam and cam-arm, and means7 substantially as described, operated by said cam and cam-arm, to raise and lower the cylinder, having a sliding stud or friction-roller operated by the lever L and crank-arm L', substantially as described.

4. In combination with the impression-cylinder, cam and cam-arm, and means, substantially as described, operated by said cam and eamarm, to raise and lower the cylinder, sliding stud or friction-roller, lever L, crankarm L', and rod G, substantially as and for the purpose set forth.

5. In eombinationwith the impression-cylinder, cam and cani-arm, and means, substantially as described, operated by said cam a-nd cam-arm, to raise and lower the cylinder, sliding stud or friction-roller, lever L, crankarm L', rod G, and spring i, all combined as set forth.

In testimony whereof witness my hand, at the city of Chicago, State of Illinois, this 20th day of September, 1886.

ROBERT MIEHLE.

Witnesses:

GEO. WV. FRTZ, AAsHLIN J. BEOKLER. 

